Cooling slushie

I recently posted this refresher on my other blog. For you who don't read it I post it here as well because I can't recommend it enough to you. It is soo soothing at a hot day.
A watermelon slushie. It's so easy and refreshing.

Cut watermelon in cubes, throw in a plastic bag and put it in the freezer. I buy whole melons and freeze the excess. If the cubes are deep frozen, let them soften for about half an hour. Put them in a blender and mix until you get a smooth slushie. If you like add water or soda.